FR2499468A1 - DEVICE FOR GUIDING A PAPER WEB IN A PRINTING UNIT OF A ROTARY PRINTING MACHINE - Google Patents

Abstract

THE GUIDING DEVICE INCLUDES A PAPER GUIDING FRAME 5, 17, MOUNTED WITH ADVANTAGEOUSLY SWIVELING BY ITS BASE ON THE FRAME OF THE PRINTING MACHINE 1, 2 AND LOCKABLE IN A POSITION NORMALLY INCLINED AT AN ANGLE A RELATIVE TO THE HORIZONTAL. THE GUIDE CHASSIS INCLUDES UPPER 7 AND LOWER 8 PAPER GUIDING ROLLS AND, ON ITS FACE OPPOSED TO THE ASSOCIATED PRINTING UNIT 1, A COVER PLATE 30, 31 PROTECTING THE PAPER AND WHICH CAN BE USED AS A BACKUP FOR A OPERATOR PLACED ON AN INTERMEDIATE PLATFORM 32 TO ALLOW UNIFORM ACCESS TO PRINTING GROUPS HIGHER 6 OR LOWER 4 OF PRINTING UNIT 1 OR 2 WITHOUT INTERRUPTING THE OPERATION OF THE MACHINE.

Description

1.

  The present invention relates to a guide device

  dage of a strip of paper in a printing unit of a rotary printing machine and more particularly a

  guiding device to guarantee accessibility

  tee to the printing units superimposed on the printing unit. With this device, it is possible, in the case of horizontal guiding of the paper, to carry out the manipulations required both on the lower printing group and on the upper printing group of the printing unit.

  the press without having to cut the strip of paper

  pier. The present invention relates to a device for guiding a strip of paper in a printing unit of a rotary printing machine comprising paper guiding rollers and allowing an operator to access

  to the components, for example the cylinders

  printing blocks, overlapping printing groups.

  German patent application No. 27 41 596 describes a device making it possible to move by means of a carriage

  vertically movable paper guide roller holder-

  ment, a strip of paper on a section of its path

  before which the strip constitutes a hindrance to access or

  handling of the printing machine. The carriage

  paper guide rolls is shaped to form if-

2. 2499468

  simultaneously a work platform for the operator of

the machine.

  With this arrangement, the machine operator

  holding onto this work platform, must

  Clearly follow the upward and downward movement of the latter. During these periods of movement the rollers of the rotary printing machine must

  be kept immobilized to prevent any risk of

  agree. Furthermore, for security reasons, this device does not allow a second operator to be able to

  also be at work below the trolley

paper guide waters.

  The object of the present invention is precisely to

  propose a device for guiding paper in a machine

  a rotary printing machine in which the paper strip between two printing units superimposed on a printing unit enters or leaves horizontally or substantially horizontally, ensuring safe access

  both in the upper printing group and in the printing group

  lower pressure of the printing unit without having to in-

break the strip of paper.

  To do this, according to a feature of the pre-

  According to the invention, the device comprises a guide frame

  paper age mounted on a side frame of the printing unit

  sion and extending obliquely at an angle from

  part of the rotary printing machine, this frame

  paper guide seat comprising at its upper ends

  lower and lower of the paper guide rollers, and, on its opposite face the printing unit, a cover plate which can serve as support for an operator of the machine.

  This arrangement makes it possible to get rid of a platform

  form of lifting to allow access to printing groups

  lower or upper stacked sion of a unit of im-

  pressure. By a temporary modification of the horizontal guidance

  paper horizontally in a vertical guide, the paper guide device can be easily tilted from

3. 249946,

  of the printing unit in a vertical position at

  away from the latter, thus providing a free passage

  bre between two adjacent printing units. As the

  positive paper guide can be easily locked

  lé on the side frame of the printing unit, thus obtaining an effective maintenance or support rollers

  paper guide. As a result, the movements are suppressed.

  damaging vibration elements of the roller support

  paper guide and hence guide rollers themselves

l same.

  Other features and advantages of the pre-

  invention will emerge from the following description

  of an embodiment, given by way of illustration but in no way limiting, made in relation to the appended drawing, in which:

  Figure 1 shows a side view of a ro-

  with at least one printing unit comprising

  superimposed printing units and a guiding device

  tiltable paper age arranged on the front of

the associated printing unit.

  As shown in the drawing, a strip of paper

  pier 3 is guided and led between a first printing unit

  pressure 1 and a second printing unit 2 of a ma-

  china rotary offset printing. The strip of paper, for example, fits vertically into the first unit

  1 and leaves it substantially horizontally in

  three printing groups superimposed on this unit, namely a lower printing group 4 and an upper printing group 6. Next, the paper strip 3 passes over an upper paper guide roller 7 and a roller lower paper guide 8 of a lower paper guide frame 5 according to the invention, undergoes

  a cusp around a paper guide roller

  pier 11 swiveling between lower beams 9

  of the machine and goes back up to pass on a roller of mistletoe

  dage 13 swiveling between upper side members 12 of the machine then on paper guide rollers

4A 2499468

  lower 14 and upper 16 of another guide frame

  superior paper 17 according to the invention, to be, fina-

  introduced into the upper printing unit 2

of the machine.

  The different paper guide rollers 7, 8,

  11, 13, 14 and 16 are each supported so that

  see turning in a way known per se.

  Each paper guide frame 5, 17 includes

  takes two parallel side protective shields 18, 19 and 20, 25, respectively, connected to each other by bracing struts (not shown).

  upper end 21 of the side shields 18, 19 com-

  carries, on its internal face, a pin for mounting the axes of the corresponding paper guide rollers 7 or 16. Similarly, the lower ends 22 of the side shields 18, 19 have pins

  for mounting the lower guide rollers 8 or 14.

  The two lower ends 22 or 15 of the shields la-

  18 and 19, or 20 and 25 are mounted so that

  see pivot in opposite bearings 23 or 24 fixed on the side members of the frame of the printing machine. The bottom articulation points of the side shields 18 and 19 or 20 and 25 and the paper guide rollers associated 8 or 14 are advantageously located on the same common axis of rotation, at a distance "a", of the order of 1.30 meters, from the front faces 26 or 27 of the lateral frames

  28 or 29 of printing units 1 or 2, respectively.

  The two upper ends 21 or 35 of the side shields 18, 19 or 20, 25, and, consequently, of the paper guide frames 5 or 17 are arranged to bear against the front faces 26 or 27 of the corresponding printing units 1 or 2, so as to extend obliquely at an angle a of about 650 (angle determined between the upper edge of the supporting beam 9 or 12 and the main direction of the side shields 18, 19 or 20, 25). The upper extremities 21

  or 35 of the side shields 18, 19 or 20, 25 are preferred

5.

  bravely fixed in an unlockable way to the frames

  28 or 29, for example by screws.

  A protective cover plate 30, 31, respectively, is mounted on the face of each paper guide frame 5, 17, respectively, opposite the corresponding printing unit 1, 2, respectively, this plate extending over the entire width of the guide frame. The cover plate 30 or 31 can thus serve as a bearing surface for the upper part of the body of an operator 33, so that the latter can

  easily reach one of the printing units, in this case

  Refer to the upper printing group 6 in the figure. At the same time, the cover plate forms a protection

  for the underlying paper strip 3 crossing the frame

  corresponding guide location. In the embodiment

  tion shown, the cover plate 30 or 31 does not

  does not extend the entire length or height

  paper guide frame 5 or 17, but be

  mine at a distance of about 50 to 60 cm from the lower end 22 or 15 of the latter. In this way, it is

  possible to tilt the side guide frame

  pier 5 or 7 above a station operator platform

  nary 32 to bring it into a vertical position (as shown in dotted lines in the figure), the chassis

  paper guide 5 or 7 can be locked in this-

  vertical position. The operator platform 32 is arranged on the side of the paper guide frame 5 or 17

  fitted with the cover plate and is mounted, for example

  full screwed, on the longitudinal members 9 or 12 of the machine frame

  born. The operator platform 32 advantageously extends between the left and right side shields 18 and 19 or

  and 25 guide frames. From this platform

  form 32, operator 33 can lean flat on his stomach

  the cover plate 30 or 31 to reach the par-

  ties normally inaccessible with horizontal paper guiding from the upper printing group 6, such as plate cylinders, rubber rollers

6. 2499468

or wetting devices.

  The operator 33 can however have access to the

  elements of the lower printing group 4 without having to

  change the normally tilted position of the paper guide frame 5, 17, respectively. For this purpose, another platform 34 or 36 will be provided extending between

  the side members 9 or 12 of the machine frame.

  The device for guiding and supporting the ma-

  china, comprising at its upper and lower ends

  i0 re paper guide rollers, is not limited in use in association with an operator platform 32. It is thus possible, for example, to provide

  tilting supports on the cover plates 30 or 31.

  On the other hand, it will be understood that we can easily-

  ment dispose at the upper ends 21 or 35 of the cha-

  multiple paper guide rollers arranged to provide paper guide paths

varied configuration.

  Although the present invention has been described in relation to a particular embodiment, it

  is not limited but is on the contrary suscep-

  tible of modifications and variants which will appear

to the skilled person.

7. 2499463

Claims (6)

  1 - Device for guiding a strip of paper in a printing unit of a rotary printing machine allowing access to the components of printing groups superimposed on the printing unit and comprising rollers of guide of the paper strip, characterized in that it comprises a paper guide frame (5; 17) mounted on a lateral frame (28; 29) of   the printing unit (1; 2) and extending obliquely   at an angle (oc) from a part of the machine   rotary printing machine (9; 12), and comprising, at its ex-   upper end (21; 35) and at its lower end (22; 15) at least one paper guide roller (7, 16; 8, 14), and, on its face opposite to the printing unit (1 ; 2), a cover plate (30; 31) which can be used support for an operator (33).   2 - Device according to claim 1, charac-   characterized in that the paper guide frame (5; 17)   is pivotally mounted on bearings (23; 24) so-   printing machine.   3 - Device according to claim 1 or the re-   vendication 2, characterized in that the guide frame   paper age (5; 17) at its upper end (21; 35) capable of being locked to a lateral frame (28; 29) of the printing unit (1; 2).   4 - Device according to one of claims   previous, characterized in that each paper guide frame (5; 17) is associated with a platform operator (32).   5 - Device according to one of the pre- claims   , characterized in that the paper guide frame (5; 17) can be brought in and blocked in a vertical position.   6 - Device according to one of the pre- claims   , characterized in that the guide frame of   paper (5; 17) is pivotally mounted in a pocket   sition in which an operator platform (32) extends   between two side shields (18,19; 20,25) of the guide frame.